Sadly my new second hand 100% carbon 430 rdm mast got blocked due to a really tiny amount of sand in the interlocking part. Anyone know any good way to unblock it without a bunch of tough guys lying around? (that has worked in the past )

I thought maybe clamping two booms on and twisting, but I thought this might damage the mast...

I can open the top of the mast, so maybe pouring some water in will help...